Which sentence has a pronoun with an unclear, missing, or confusing antecedent?

a.
after i read the book, i returned it to the library.

b.
i found a caterpillar on a leaf, and i carefully carried it to my brother.

c.
this shirt is dirty, so i will put it in the laundry basket.

Read the sentence from a student’s essay about “the treasure of lemon brown.” greg sees his father differently after he speaks with lemon brown. what revision should the student make to clarify the main idea of this sentence? replace “sees his father differently” with “appreciates his father.” add the phrase “at the end of the story” after the word “differently.” change the wording of “speaks with” to “has a conversation with.” remove “after he speaks with lemon brown” from the sentence.